I love my aquarium. However, the fish there are having a hard time surviving, and it's not due to lousy filters or pumps, it's the fishes themselves.

The first fishes to dwell in the aquarium were the Blue neon fish and guppies. They co-existed peacefully.

However, a new batch of fishes was added - Black violent fish, Blue violent fish, 2 lobsters (5cm each), and some suckers. At once, the 2 violent fishes started hiding. The 2 lobsters dominated the aquarium and attacked the weak sucker fish.

Things changed, however, when a third batch of fishes were added - 3 blue violent fish, Orange neon fish, red-eye fish, a tiger fish, 2 guppies, and lots of Yamato shrimp. The tiny Yamato shrimp were devoured by the violent fish and lobsters. The dead remains of the shrimp were eaten by the guppies. However, the lobsters decided to live in the plants and hid there, coming out only at night. This time the violent fish dominated the aquarium. They were extremely fierce. They bit off the fins of most of the fish, including the guppies. Yesterday, all the blue neon fish were killed by the violent fish. Their heads, bodies, and tails were all split, and the disgusting thing was that the violent fish and shrimp were eating them. Yuck. Right now, the violent fish are chasing the red-eyes and orange neons, and I think that in a few days they will be devoured as well. That's bad - the only ones left would be the hardy shrimp, the suckers, and the lobsters. By the way, the lobsters and violent fish also fight occasionally. Violence even in the aquarium, it's a violent world.